| 摘要 |
PURPOSE:To ensure the information work in a low-cost system, by installing the single-structure load distributor which is controlled by the stored program and the backup position equipment which which performs the attendant service in place of the load distributor in case some fault occurs to the distributor. CONSTITUTION:The load distributor consists of channel netwoek NW, incoming trunk ICT which is provided at the incoming side of NW and has talkie device TKE, outgoing sender OST which sends out the connection code, position equipment POS which is provided at the outgoing side of NW, attendant board BD, outgoing trunk OGT which enables the talking with the originating subscriber, talkie trunk TKT which sends the talkie tone to arouse the attention of the originating subscriber, and announcing machine AM each. Such load distributor is controlled by controller CONT and furthermore controlled via scanner SCN and switch trunk controller STC each. Thus attendant board BD is selected and connected in accordance with the incoming to ICT, and the switching is given to backup position equipment BUPOS in case the fault occurs. As a result, a low cost can be realized for the system as a whole, thus enabling the application of this system even to a small- scale station. |
